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## Class 10 Physics (India)

### Course: Class 10 Physics (India)>Unit 3

Lesson 2: Electric potential & potential difference

# Solved example: Potential difference & work done

Let's solve a couple of numerical on potential difference (voltage) and work done.  Created by Mahesh Shenoy.

## Want to join the conversation?

• can u tell me how many electrons are in 1 C of charge
• In -1C there are 6.25*10^18 electrons
however , in +1C there are no electrons , it has 6.25*10^18 protons ... it is sign sensitive
• I didn`t get the formula he applied for the first question, what does work equal to?
• Work done to move _n_ number of joules per coulomb is equal to volt. So Mahesh, in this example, took volt = work. That is 3V= work = 3J/C.

(for reference, work = Fs. F for force and s for displacement.)
(1 vote)
• In questions similar to the ones in the video, how would I solve for Voltage Difference if my Work is -2E-02J and my charge were -5 micro coulombs?
(1 vote)
• Voltage difference or potential difference is the same as volt and is simply the difference in potential energy across any 2 points; it it calculated by the formula V=Work done/coulomb
in the ncert book, there is a statement` no charge is drawn from it `. what does this statement mean